336 Coleopterological Notices. 



three times as long, punctured nearly as in rufipes, all the punctures very fine 

 and sparse toward the suture where the striae are extremely feebly suhim- 

 pressed, the punctures much coarser, denser and strongly asperate laterally. 

 Abdomen finely, sparsely punctate. Legs long and slender, the posterior tarsi 

 slightly shorter than the tibiae. Length 6.0-6.7 mm. ; width 2.5-2.8 mm. 



Arizona. 



Although belonging to the rufipes section of the genus, this 

 species is not allied very closely to any other, and in some charac- 

 ters is intermediate between that group and convexicolle. The 

 metasternum is much shorter than in duhium or rufipes, but longer 

 than in convexicolle, the distance from the posterior margin of the 

 coxa to the transverse groove being but slightly greater than the 

 length of the first ventral segment, while in the species mentioned 

 it is fully one-half longer than the segment. The pronotal punc- 

 tuation is finer than usual in this section of the genus, and the size 

 is much smaller. 



Etl. l)icolor Horn.— Trans. Am. Phil. Soc, XIV, p. 268.— Oblong-oval, 

 strongly convex, rather feebly shining and alutaceous, piceous-black ; head, 

 pronotum, sterna, legs and antennae paler, rufo-ferrugiiious. Head very short 

 and transverse, strongly narrowed from base to apex, the latter more than 

 usually narrowly truncate or extremely. feebly sinuate ; surface coarsely, very 

 densely punctate, a spot near the base of the occiput usually impunctate ; 

 antennae rather short and robust. Prothorax about four-fifths wider than long, 

 the apex scarcely more than four-fifths as wide as the base, feebly emarginate 

 in circular arc, the angles slightly obtuse but not at all rounded ; base trun- 

 cate, feebly sinuate for a short distance at each side of the middle ; basal angles 

 slightly acute, not in the least rounded and just visibly prominent; sides 

 parallel and very feebly arcuate, then strongly convergent and more strongly 

 arcuate in apical third ; disk rather coarsely, deeply, somewhat sparsely punc- 

 tate toward the middle, much more coarsely, extremely densely but not very 

 confluently so laterally. Elytra scarcely three times as long as the prothorax 

 and, behind the middle, nearly one-fifth wider ; sides rather strongly arcuate ; 

 apex broadly, very obtusely ogival ; disk not very coarsely, rather feebly 

 punctate, somewhat confusedly near the suture, in approximate and more 

 asperate series laterally. Abdomen finely, feebly, sparsely punctate, more 

 coarsely, densely so laterally ; metasternum just visibly longer than the first 

 ventral segment. Legs moderate, the posterior tarsi unusually short, scarcely 

 two-thirds as long as the tibite. Length 6.5 mm. ; width 3.2 mm. 



Arizona. 



The elytra are unusualh'- inflated and the species may be readily 

 distinguished from any other by its convex form, alutaceous lustre 

 and peculiar coloration. 



